Sealant for pipe joints



United States Patent 3,510,321 SEALANT FOR PIPE JOINTS Robert L. Turner, 2127 N. Keebler Road, Collinsville, Ill. 62234 No Drawing. Filed Dec. 23, 1968, Ser. No. 786,401 Int. Cl. G09k 3/10 US. Cl. 106-33 5 Claims ABSTRACT OF THE DISCLOSURE BACKGROUND OF THE INVENTION Field of the invention The invention relates to a sealing compound for threaded pipe joints and the like which provides a nonhardening seal which is not subject to deterioration from oxygen.

Description of the prior art The most common sealant for pipe joints has been glycerine litharge cement consisting of a mixture of glycerine and lead oxide. Although glycerine' litharge cement provides an efiective seal for pipe joints, it has the serious disadvantage that it becomes extremely hard as it ages. Hence it cannot be prepared in advance of use and stored and it is difficult to disassemble pipe joints sealed with it without stripping their threads.

SUMMARY OF THE INVENTION The invention provides a nonhardening oxygen-resistant threaded pipe joint sealing compound which has these properties by virtue of the principal ingredients of the compound, namely, ferric oxide and glycerine.

DESCRIPTION OF THE PREFERRED EMBODIMENT The ingredients of my sealing compound and the proportions thereof are as follows:

Parts Fe'rric oxide powder 4 to 7 Glycerine 2 I have found that most satisfactory results can be obtained with 5 parts of ferric oxide powder to 2 parts of glycerine.

Percer Ferric oxide 97.3 Silica 2.2 Graphite 0.1 Calcium Trace The silica, graphite and calcium are' impurities presenti the powder, and with the possible exception of th graphite, are believed to contribute nothing to the el ficacy of the compound.

The compound is harmless to use, inexpensive to makt provides a stable oxygen-resistant seal and, unlike glyt erine litharge cement, it will not set up or harden i1 respective of how long the joint remains in service, s that if it becomes necessary to disassemble the joint, th joint members can be freely unscrewed without damag to the threads. It is believed that the presence of graphit may by reason of its lubricating properties enhance th ease of assembling and disassembling joints coated wit the compound.

I claim:

1. A compound for sealing pipe joints and the lik consisting by volume of substantially four to seven pa11 of ferric oxide powder and two parts of glycerine.

2. A compound according to claim 1 containing b volume substantially four parts of ferric oxide powde and two parts of glycerine.

3. A compound according to claim 1 containing b volume substantially five parts of ferric oxide powde and two parts of glycerine.

4. A compound according to claim 1 containing b volume six parts of ferric oxide powder and two part of glycerine.

5. A compound according to claim 1 containing b volume seven parts of ferric oxide powder and two part of glycerine.

References Cited UNITED STATES PATENTS 604,532 5/1898 Jewett 106-3 JULIUS FROME, Primary Examiner T. MORRIS, Assistant Examiner US. Cl. X.R. 106-287 

